I remixed this from Vaustick's Joycon Holder for Ikea Skadis Pegboard (https://www.thingiverse.com/thing:5949839/files) to work with Sy's Peglock system by StellasFun. I used the Negative Boolean Body for Sy's Peglock from RileyEnginerd. 

Thanks to all the great creators who made this a breeze. You all rock!

You will need one of each file to mount.